Network slicing is still at its early stage in terms of development, therefore, further enhancement and studies are needed to become a mature technology and thus be adopted over various domains of emerging 5G system. Despite significant advantages that network slicing brings to 5G system, there are also some challenges that are arisen. In this section, we are going to identify main research problems and future directions in the field of network slicing that are needed to be investigated for its full implementation over all parts of 5G system [1]} [2]} [3]}.
